Proportional gas and air mixing device



April 24, 1928.

J. L. KLUPPEL PROPORTIONAL GAS AND AIR MIXING DEVICE Filed July 24.1926' 2 Sheets-Sheet 1 f/Mmi April 24, 1928. 1,667,072

J. L. KLUPPEL I PROPORTIONAL GAS AND AIR MIXING DEVICE Filed July 24.1926 2 Sheets-Sheet 2 1524 Fiji;

Patented Apr. 24, 1928. I

UNITED STA JOHN L.

1,667,072, TES PATENT OFFICE.

KLUPPEL, OF HOUSTON, TEXAS, ASSIGNOR TO PORTABLE ROTARY RIG COM- PANY,OF HOUSTON, TEXAS, A CORPORATION OF TEXAS.

PROPORTIONAL GAS AND AIR MIXING DEVICE.

Application med um 24, 192 Serial No. 124,588.

This invention relates to new and useful improvements in a proportionalgas and air mixing device.

One object of the invention is to provide a mixing device speciallydesigned for the utilization ofnatural gas as a motive fuelin internalcombustion motors.

Another object of the invention is to provide a mixing device of thecharacter described, of such construction that the supply of gas and airwill be automatically proportioned so as to. supply the'proper mixturesfor different speeds of the motor.

lVith the above and other objects in view the invention has particularrelation to certain novel features of construction, operation andarrangement of parts, an example of which is given in this specificationand illustrated in the accompanying drawings, wherein Figure 1 shows aside elevation of the mixing device associatedv with an intake manifoldof an internal combustion motor. F igure'2'shows a vertical sectionalview thereof.

Figure 3 shows a horizontal sectional view taken on the line 3-3 ofFigure 2, and

Figure 4 shows a vertical sectional view taken on the line 4-4 of Figure2. Referring now more particularly to the drawings, wherein likenumerals of reference designate similar parts in each of the figures,the numeral 1 designates an intake manifold adapted to be connected toan internal combustion motor in the usual way. The numeral 2designates-an ordinary ,gasoline carburetor adapted to be usedforstarting, or when the natural gas is not available. The intake pipe 3leading from this carburetor to the manifold may be controlled by theusual butterfly valve through the arm 4, connected to the stem of saidvalve and the intake pipe 3 is also controlled by the shut-off valve 5,controllable through the arm 6 connected to the stem of said valve andthis valve 5 may be adjusted to any desired position and theremaintained by the conventional rack-and-dog arrangement 7. The intakepipe 3 has the tubular insert 8 connected into it, said insert being ,inthe form of a T with a flange connection 9 to which the natural gascarburetor 10 is bolted. This mixing device is formed with an intakepipe 11 controllable by the valve 12, which may be manipulated throughthe arm the oppositely disposed 13, fixed to the stem of the valve, saidvalve 12 being located between the mixing device 10 and the intake pipe3. Formed integrally with the intake pipe 11 there is the cylindricalmember 14 whose outer end is closed by the cap 15' bolted thereto. Acup-shaped plunger 15 is reciprocablein the cylindrical member 14 andarranged within the plunger 15'and connected thereto there is a sleevevalve 16, which works'over the inner end of the nipple 17. This nippleis fitted through a gland 18, which is bolted to the side of the intakepipe 11, and projects up into said pipe and its projecting end isprovided with a lateral discharge slot 19 adapted to be opened andclosed by the valve 16. The nipple 17 is secured in position by means ofthe clamp nut 20 which is screwed on to the slotted end of the gland 18and the outer end of the nipple 17 is formed with a connection 21 intowhich the gas line 22 is threaded. Mounted on the gland 18 there is atubular plunger guide 23 over which the plunger 15 works and this guidehas air ports 24, 24, which are aligned with the intake-pipe 11 andwhich contract downwardly.

The discharge slot 19 faces toward the the valve 12 opened. With themotor now runningthe suction produced. by the operation of the motorwill create a partial vacuum in the end 27 of. the cylindrical member 14and this vacuum will operate to lift the plunger 15 and the valve 16 toopen the discharge slot 9 as well as the ports 24. This will admit gasthrough the nipple 17 and air through the intake pipe 11 which willmingle creating an explosive mixture and as the speed of the motor isaccelerated the vacuum in the outer end 27 of the cylindrical member 14will be increased causing the plunger 15 to rise and as it rises theamount of air admitted through the ports 24 will be accelerated orincreased in greater proportion than the amount of gas, due to theupwardly widening form of the air ports 24 and thus a lean mixture willbe admitted to the motor when running at high speed. As the motor isslowed down the vacuum in the outer end 27 of the cylindrical member 14will be decreased and the plunger 15 and the valve 16 will descendthuscutting off the supply of gas and air.

It is to be noted that the sleeve valve 16 at its lower end is slightlyabove the lower end of the plunger 15 so that the lower end of the slot19 will not be entirely covered when the plunger is in its lowermostposition, thus admitting a small amount of gas to keep the motor runningidly and on the upper side of the gland 18 there is a channel 28 cutacross the same to admit a small amount of air when the plunger is inits "lowest position to mix with the gas admitted to keep the motorrunning idly.

It is thus apparent that when the motor is running at a high speed alean mixture will be provided and as the motor slows down the supply ofair will be cut off, in greater proportion than the supply of gas, so asto give a richer mixture at low speeds.

lVhat I claim is:

1. A mixing device including a fuel mixture intake conduit, acylindrical member carried by said conduit and closed at its outer end,a plunger in said cylindrical member adapted to control the flow of airthrough said conduit, a nipple having a longitudinal discharge openingthrough the wall thereof into said conduit, and a sleeve valve fittedover the nipple and movable with said plunger and controlling saidopening, there being a by pass connecting the conduit with saidcylindrical member above the outer end of said plunger.

2. A mixing device including a fuel mixture intake conduit, acylindrical member carried by said conduit and Whose outer end isclosed, a cup-shaped plunger reciprocable in said cylindrical member, aplunger guide spannin said conduit and formed with air ports alignedwith said conduit and over which said plunger works to control saidports, a gas discharge tube projecting into said guide and formed with alongitudinal discharge opening through the wall thereof, a sleeve likevalve carried by the plunger and working over said tube and controllingthe opening thereof, said device being provided with a by pass leadingfrom said conduit and entering said cylindrical member beyond the outerend of the plunger.

3. A mixing device including a full mixture intake conduit, acylindrical member carried by said conduit and whose outer end isclosed, a hollow plunger reciprocable in said cylindrical member, aplunger guide over which the plunger works and having air ports alignedwith said conduit, and controlled by said plunger said device beingprovided with a by pass leading from the. outer end of the cylindricalmember beyond the outer end of the plunger and connected into saidconduit, :1 gas inlet conduit having a longitudinal discharge openingthrough its wall and into said intake, conduit, a sleeve valve carriedby the plunger and working over said gas inlet conduit and controllingsaid opening.

4. A mixing device including an intake conduit, a cylindrical member*arried by said conduit and having its outer end closed, a plungerreciprocable in the cylindrical mem her and adapted to control the flowof fluid through said conduit, a gas conduit having a longitudinaldischarge opening through its wall and into said intake conduit and avalve connected to and movable with said plunger and controlling saidopening, there being a by pass leading from said cylindrical memberbetween the outer ends of said plunger and member, said by pass beingconnected into said conduit.

5. A mixing device having an intake conduit, a cylindrical membercarried by said conduit, and whose outer ends is closed, meansreciprocable in the cylindrical member and means in said conduitcooperating with said reciproca'ble means and formed with an air portwhich enlarges toward said cylindrical member and which is controlled bysaid reciprocable means, a gas delivery conduit having a. dischargeopening in said air intake conduit, a valve movable with saidreciprocable means and controlling said opening there being a by passcommunicating with the conduit and also comn'iunicating with thecylindrical member between the outer end of said member and the plunger.

6. A mixing device having a full mixture intake conduit, a cylindricalmember carried by said conduit and whose outer end is closed, means,having an opening in the conduit, through which gas may be deliveredinto said conduit, a guide spanning said conduit and having a port,which enlarges toward the cylindrical member, means reciprocable in saidcylindrical member and whose position varies in accordance withvariations of pressure on opposite sides thereof for controlling saidport and ol'icning, said device having a bypass, leading from the outerend of the cylindrical member beyond the outer end of said reciprocablemeans which enters said conduit.

In testimony whereof I name to this specification.

JOHN L. KLUPPE-L.

have signed my

